jeff it is about 10 wats They last long I have mine for las three years and still works like I bought it yesterday very impressed product worth the money.

jeff you can wash it on very low temperature but I normaly just take a clean damp cloth and wipe mine clean and I make sure I keep it hang up.

jeff Hello The correect size will be 4XL OR 5XL REMEMBER YOU DO NOT HAVE TO ZIP IT CLOSE it still works perfectly even when un zipped.You also can wear it over your or under your shirt or jersey.

jeff Hi you need to order 5xl or 4xl but you won't be able to zip up.......but relax you will still stay nice and warm or Hot and the vest still works perfectly.

jeff You can use in shower but they work much better in Hair Salons and in the Kitchen,advise for showers go for 3500W units. They take long time to heat, but all the tanks are designed that when they reach a 55* they slowly reduce the heat,they also have on the side of the unit a small pressure release valve to release extra steam build up in the unit for safety.

jeff Depends on how long you neef the heat between 10000mah to 20000mah recomended and buy recognized reliable powerbank..for safety as for the vest or jacket great product...DOUBLE CHECK SIZES BEFORE PURCHASE TO ENSURE THEY FITT.

jeff no they are independent..and solar..and only bright up up to 5.5 meter so they are safe

jeff it only heats up 65°But that is safe and far enough for a great product I sell them to hair Salons